Rapidly turning the eyes and head toward a painful stimulus is a function of which one of the following tracts?
A. Trigeminoreticulolimbic
B. Spinoreticular
C. Spinomesencephalic
D. Trigeminospinothalamic
E. Dorsal column medial lemniscus
ANS: C
Rationale: The spinomesencephalic tract carries nociceptive information to the superior colliculus and periaqueductal gray matter, producing a rapid turning of the eyes and head toward the source of the noxious input.
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